The Hidden Battle Over Who Pays for Carbon Emissions

Carbon accounting has become the most contentious yet overlooked battleground in the fight against climate change. As revealed by a report from the Aspen Institute, released on October 9, the methods used to measure and attribute greenhouse gas emissions are driving fierce disagreements among academics, non-governmental organizations, and industry leaders. The outcome of these debates will fundamentally influence climate regulations and corporate energy strategies worldwide.

For over twenty years, the Greenhouse Gas Protocol (GHGP) has served as the de facto global standard. This framework categorizes emissions into three distinct scopes: Scope 1 covers direct emissions from company operations, Scope 2 addresses electricity and heating purchases, and Scope 3 encompasses value chain emissions. While this system has spurred a boom in renewable energy contracts by providing predictability for corporate buyers, it faces growing criticism and calls for reform.

The central tension revolves around the question of responsibility. Critics argue that the current GHGP model permits “double-counting,” where multiple entities—such as a steel manufacturer, a construction firm, and a building owner—may all claim responsibility for the same emissions. Furthermore, the scope 3 rules require oil companies to account for the emissions generated when consumers burn their fuel, creating massive carbon footprints for producers.

In response, an alternative model known as “e-ledgers” has gained traction. Originating in academic circles around 2021 and backed by a coalition including ExxonMobil and BlackRock in 2025, this approach assigns each unit of emissions to a digital ledger that transfers with the product. This method shifts accountability to the end consumer rather than the producer, incentivizing companies to focus on decarbonizing their own operations while providing precise procurement data.

Despite the heated discussions at a recent Aspen summit, participants reached a tentative ceasefire. Some stakeholders suggested a hybrid model where e-ledgers track product-specific footprints while GHGP rules apply to overall corporate reporting. This evolving landscape will soon impact major regulatory frameworks, including climate disclosure rules in California and the European Union, determining who bears the burden for future emissions.